AS/NZS 1163 SHS Dimensions for Cleat Connections: A Practical Guide for Structural Design
AS/NZS 1163 defines the standard dimensions, wall thicknesses, corner radii, and material grades for Square Hollow Sections (SHS) used in Australian steel construction. These dimensions play a critical role in the performance of cleat connections, as they directly affect bolt bearing capacity, edge distances, load transfer, and overall structural safety.
Correct selection of SHS size and wall thickness ensures cleat connections can safely resist tension and shear forces without premature failure such as tearing, deformation, or bolt pull-out. Factors such as steel grade (C250 vs C350), corner radii clearance, and compatibility between cleat thickness and SHS wall thickness are essential for compliant design under Australian Standards.
Using SHS sections manufactured to AS/NZS 1163, along with properly engineered cleats, allows builders and engineers to achieve faster installation, predictable performance, and long-term durability. Understanding these dimensions is key to delivering safe, efficient, and compliant steel connections in Australian construction projects.